We apologize

This item has been discontinued

Every car or truck has wasted space. You know, the places behind or beneath the seats, where loose change and french fries hide. Those spaces are cryin' for bass. MTX Audio responds with ThunderForm vehicle-specific subwoofer enclosures. MTX Audio engineers measure top-selling vehicles and evaluated their sonic signatures. Using unique materials and creative manufacturing processes, MTX develops enclosures that deliver high quality sonic performance, yet fit in the wasted space where you can't fit anything else. ThunderForm vehicle-specific subwoofer enclosures are designed to fill your car's deepest, darkest corners and deliver mother-loads of bass. ThunderForm enclosures are engineered to deliver high SPL with very low distortion. They're available in a variety of colors to match the interior of your particular vehicle so you won't have to compromise cosmetic integrity. This is especially nice for those with leased vehicles who want to enjoy added bass without the hassle of messy installations.

Key Features:

CHEVY EXTRA CAB 1988-2004 ThunderForm

Also fits '88-'01 GMC Pick-up and 3-door

Gray Model

Includes a built-in Amplifier and One 10" subwoofer

Location: Under rear seat on driver side. Bolts to floor of vehicle

No loss of leg room. Factory jack kit is not disturbed.

Molded in factory colors

Install hardware supplied

Absolutely seamless - no seams to fail

Dimensions: 30" x 12.75" x 9.5"

Weight: 28 lbs

RMS Power Handling: 225 watts

Sensitivity: 87 dB

Enclosure Volume: .9 cubic foot

Impedance: 4 Ohm

Authorized Internet Dealer

1-year Manufacturer’s warranty

Specifications

Second Depth

The second depth is used only when the box is slanted or angled. This value is the top measurement and it is measured in inches.

Depth

The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.

Height

The height of the item, measured from top to bottom, in inches.

Width

The width of the item from left to right (side-to-side) measured in inches.

Product Summary

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Customer Testimonial

“

Sonic is the best at everything! They have the best prices, best selection and their customer service is unbelievable! I had a voice cool go out on my nvx vcw 152 and called them up explained what happened they told me I was still under warranty I boxed it up and within 7 days I ha a brand new sub!____

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.